Lock for doors, cupboards, and the like.



H. J. GUWELL. LOCK FOR DOORS, GUPBOARDS, AND THE LIKE.

APPLICATION FILED SEPT. 7, 1904.

Patented Nov. 24, 1908.

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HENRY JAMES COWELL, OF ADELAIDE, SOUTH AUSTRALIA, AUSTRALIA.

LOCK FOR DOORS, CUPBOARDS, AND THE LIKE.

Specification of Letters Patent.

Patented NOV. 24, 1908.

Application filed September 7, 1904. Serial No. 223,592.

To all whom it may concern:

Be it known that I, HENRY JAMES CowELL, architect. a subject of the Kingot' Great Britain and Ireland, residing at 75 King William street,Adelaide, in the State of South Australia, Commonwealth ot' Australia.have invented a certain new and useful Improved Lock for Doors,Oupboards, and the Iiike, of which the following is a specitication.

My invention relates to an improved lock tor doors, cupboards andanalogous purposes, the special object of the same being to provide auappliance which shall be comparatively simple and inexpensive inconstruction and at the same time be capable otl being` more easilyfitted in position than is the case with the majority oit locks atpresent in use.

In carrying my invention into ettect the casing is made more or lesstubular in form so that it can be fitted into a cylindrical shaped holedrilled into the door or cupboard by means ot an auger or otherconvenient appliance and the internal mechanism of the lock so designedthat the bolt can readily be reversed so as to apply the fitting toeither a. right or lett handed door, the handle being capable ot turningin either direction.

In order that my invention may be the better understood I will nowproceed to describe the same by aid ot the accompanying illustrations inwhich Figure l is an external elevation oi:l the lock. Fig'. 2 is an endview ot' same. Fig. 3 is a sectional plan. Fig. 4t is a side view otbolt. Fig. 5 is a side view ot lock with portion o't casing removed andbolt projecting. Fig. (3 is a similar view ot' lock but with boltwithdrawn. Fig. T is a similar view ot lock with handle in reversedposition, the locking mechanism being omitted and a modication in shapebeing illustrated. Fig. S is a cross section of tube or barrel of lock.Fig. 9 is a detail of mechanism showing the appliance in unlockedposition. Fig. l is a detail of mechanism showing the appliance inlocked position. Fig. 1] is a detail o't' alternative or equivalentlocking mechanism in unlocked and locked positions. Fig. l2 is amodiiication of connection between handle barrel and bolt in sideelevation, end view and plan.

Similar letters et' reference are used to denote similar orcorresponding parts wherever they occur throughout the drawings.

In this drawing a is the outer casing of the lock which is provided atthe ends with the back plate and the tace plate c, the latter havingholes drilled therein for the reception otI fastening screws. The casingis more or less cylindrical in section as shown and consists ot' a frontand back portion the two parts being held together by the screw (lpassing through thc hole fl and are further secured by a small lug orprojection c on the front plate which tits into a corresponding recessin the tace plate c, Fig. 3.

The metal bolt is shown at and is arranged to pass through the taceplate and works within a suitable guide or recess in the iixed bridge gfinally terminating in the tceshaped extension /i.

A metal compression spring j is coiled round the recess portion of thebolt and taking a bearing against. the tixcd bridge 5'/ presses againsta shoulder termed by the recessed portion oit the bolt l.: is a gripplate which tits behind the eX- lension Il. ot' the bolt and ispivotally joined to the rollback Z by means ot' the bent connecting rodm. a lug being provided on the barrel through which a pin or rivet ispassed t'or the retention oit the connecting rod.

In Fig. l2 I have illustrated a inoditication or simpliiied torni otthis mechanism wherein the bent connecting rod is dispensed with and inlieu thereof a grip plate having a lever integral. therewith is used asindicated b v the letters /.'-/nl as will be readily undersl ood onreference to the drawings.

The casing may be cut away both at top and bottom as indicated at n inorder to enable the rod to work without impediment when the handle isturned to the right or left, and on reference to Fig. 3 it will readilybe understood that the bolt is reversible for right or lett handediittings as indicated by the dotted lines.

An iniportant feature in my invention consists ot' the locking gearwhich is characterizcd by its cxtreme simplicity. A plate 0 is fastenedto the side ot' the barrel, or vformed integral therewith, to attord asuitable bearing for the sliding' parts, a key hole being provided at y)for the reception o'tl an ordinary key. q is the lock-slide or tumblerwhich is held in position by the screw r, which engages the slottedportion s, a rest pin being fixed at t for supporting and holding thelock.

In Fig. 9 the appliance is shown in an unl locked position, but when thekey is turned i influence in the opposite direction restores in thedirection of the arrow 1t lmpinges l the bolt to its normal position.'

upon the projection 'u and lifts the lock-slide.

or tumbler upwards and forwards so as to enable the rest pin t to engagein the recess v where it is held by aid ot' the spring w as illustratedin F ig. l0. lt will readily be seen that in this position thelock-slide or tumbler butts against the tee-shaped eXtension /L ot' themetal bolt thus preventing it trom being drawn baclovards by means otthe handle.

Qi mechanical equivalent of the above described locking gear isillustrated in two positions in llig. ll, but the recess y'u on thesliding` plate being in a somewhat ditlerent position to that describedin the preceding lignres instead oi' engaging with a rest pin on thebody ot the loci; engages with a` corresponding projection upon the backof the iandle barrel thereby preventing the same from being revolved. lnthis modilication the helical spring g/ on the side oit the slideperforms a similar function to the spring QU previously mentioned bykeeping the slide in proper position. A small beveled bar or projectionis termed or iixed on the body of the lock and engages in a slightrecess on the back ol' the slide when unlocked in which position it ismaintained by the influence of the helical spring so as to prevent anyaccidental movement ot the slide.

ln lfig. 'T lit will be seen that the back plate dispensed with the endot the barrel being rounded ott' illustrated.

The application and use of my lool; may be briefly described astollows2-By means of an anger or other suitable tool a hole is drilledfor the reception of the barrel of the lock and the appliance is thenheld in position bv the screws which pass through the ilush plate`further holes being cut for the passage of the handle and the hey. Theturning of the handle either forwards or baclm'ards causes the lever todraw the bolt backwards by the intermediate action ot the grip plate 7c,or by the more direct mechanism shown in Fig. l2, but as soon as thehandle is released the spring exerting its lt is to be understood that Ido not contine myself absolutely to the sine or shape ot the detailsshown in the accompanying drawings but that the same may be modiliedwithin reasonable limits.

rlhe internal mechanism is particularly applicable to ordinary householdfittings and doors and may be applied generally to mortice locks and rimlocks. By removing the grip plate and the roll back both ot which arereadily detachable the bolt can easily be lifted out of the bridge andlace plate and returned again in a reversed position so as to render thelool; adjustable to whichever direction the opening of the door is to beapplied.

laving new particularly described and ascertained the nature ot' my saidinvention and in what manner the same is to be performed l declare thatwhat l claim is l. A lock comprising a casing, a bolt having a teeshaped rear end, a plate having a forked end bent at right anglesengaging said tee shaped end7 a handle barrel having a lug` thereon anda bent. lever connected at one end to said lug and at its other end tothe plate.

2. A locl comprising a casing having a bridge g therein, a bolt havingan enlarged head and a tee shaped end, a spring having one end bearingagainst the said head and the other against the bridge, a plate having aforked end bent at right angles engaging said tee shaped end, a handlebarrel, a bent lever connecting said barrel with the plate, a slidingplate, a key for moving the same to prevent movement of the beteremeptioned parts and means tor holding the sliding plate in its forwardand rearward positions.

ln witness whereof l have hereunto signed my name in the presence of twosubscribing vitnesses.

HENRY JAMES COW/TELL. lllitnesses z JOHN HERBERT COOKE, JAMES F 1N env.

